GlobeSherpa, a Portland startup that sells transit tickets over smartphones, has raised $1.3 million in additional investment to help finance a national rollout.

Founded in 2010, GlobeSherpa reached a deal with TriMet last year to sell paperless e-tickets. Transit riders show the on-screen ticket to drivers or fare inspectors to prove they've paid. The company has nine employees, all in Portland.

TriMet is now testing the technology. Originally slated to roll out this spring, it's undergoing additional testing and is now set for a broad introduction this summer. GlobeSherpa says it's close to a similar deal with the City of Portland for the Portland Streetcar, and is negotiating with a half-dozen other U.S. transit agencies.

The Oregon Angel Fund led today's investment. Previously, GlobeSherpa had raised $500,000 from individual investors, from the angel investor consortium TiE Oregon, and from the Portland Seed Fund.